U.S. President Donald Trump on Friday pushed Kyiv to sign a critical minerals agreement while Washington pursues talks on ending Russia's war in Ukraine. Ramping up criticism of Ukrainian President Volodymyr Zelenskyy in what has been a remarkable turn in U.S. policy and relations with Kyiv and Europe. Conversations with Michelle Michot Foss, Fellow in Energy, Minerals & Materials, at Rice University’s Baker Institute for Public Policy; Jamil Jaffer, President and Founder of the National Security Institute.